Issue posted to Arch Linux forum. Kernel output of 4.2.3:
[ 14.797299] Unable to handle kernel NULL pointer dereference at virtual address 000001f5
[ 14.805442] pgd = ed460000
[ 14.808196] [000001f5] *pgd=00000000
[ 14.811821] Internal error: Oops: 5 [#1] SMP ARM
[ 14.816445] Modules linked in: ppp_async arc4 rt2800usb rt2x00usb rt2800lib rt2x00lib mac80211 cfg80211 crc_ccitt rfkill imx_ipuv3_crtc imx_ipu_v3 dw_hdmi_imx dw_hdmi uio_pdrv_genirq uio imxdrm drm_kms_helper sch_fq_codel ppp_generic slhc ip_tables x_tables
[ 14.839599] CPU: 2 PID: 240 Comm: systemd-network Not tainted 4.2.3-1-ARCH #1
[ 14.846732] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 14.853268] task: ed3c2080 ti: ed3e6000 task.ti: ed3e6000
[ 14.858686] PC is at fec_enet_open+0x3d4/0x518
[ 14.863140] LR is at genphy_suspend+0x54/0x5c
[ 14.867499] pc : [<c0644f00>] lr : [<c063ca24>] psr: 00070013
[ 14.867499] sp : ed3e7b78 ip : ed3e7ab0 fp : ed3e7bdc
[ 14.878981] r10: 00000200 r9 : ee366800 r8 : c1136770
[ 14.884211] r7 : 00000001 r6 : ee5e9d44 r5 : 00000001 r4 : ee5e9800
[ 14.890744] r3 : 000010f9 r2 : c1036a24 r1 : c103696c r0 : ee5e9800
[ 14.897272] Flags: nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 14.904425] Control: 10c5387d Table: 3d46004a DAC: 00000015
[ 14.910181] Process systemd-network (pid: 240, stack limit = 0xed3e6220)
[ 14.916897] Stack: (0xed3e7b78 to 0xed3e8000)
[ 14.921285] 7b60: 00000006 00000008
[ 14.929487] 7b80: ed3e7ba4 ee367000 3206e31c 30383831 652e3030 72656874 0074656e 38383132
[ 14.937683] 7ba0: 2e303030 65687465 74656e72 0036303a c09fc628 c0644b2c ee5e9800 c09fc628
[ 14.945880] 7bc0: ee5e9830 00000000 00000008 ed424180 ed3e7bfc ed3e7be0 c0817258 c0644b38
[ 14.954071] 7be0: ee5e9800 00000001 00001003 00001002 ed3e7c24 ed3e7c00 c0817500 c08171ac
[ 14.962267] 7c00: ee5e9800 00001002 ee5e9940 c09fc628 00000000 00000008 ed3e7c4c ed3e7c28
[ 14.970471] 7c20: c08175cc c0817470 ee5e9800 00000000 ed3e7cd4 c09fc628 ed1f7310 00000008
[ 14.978665] 7c40: ed3e7cb4 ed3e7c50 c0825e50 c08175b0 c08b56a8 c04431a0 c0a6a288 ef7b1990
[ 14.986860] 7c60: ed3e7c84 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 14.995052] 7c80: 00000000 ed1f7328 ed3e7cb4 ee5e9800 ed1f7300 ed424180 ed424180 00000000
[ 15.003238] 7ca0: 00000008 00000030 ed3e7d8c ed3e7cb8 c0826d58 c0825b58 ed3e7cc4 00000000
[ 15.011434] 7cc0: 0000000e ee036800 ed3e7cec ed3e7cd8 c01529b0 00000000 00000000 00000000
[ 15.019628] 7ce0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 15.027822] 7d00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 15.036012] 7d20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 ed1f7320
[ 15.044211] 7d40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 15.052407] 7d60: 00000000 00000000 00000000 00000000 ed3e7d8c 00000024 ed1f7300 00000000
[ 15.060603] 7d80: ed3e7dcc ed3e7d90 c0827770 c0826c70 ed3e7ddc ed3e7da0 c0174060 c092a00c
[ 15.068793] 7da0: 00000001 ee001cc0 00000000 ed1f7300 ed424180 c08275c8 ee2e9800 00000000
[ 15.076988] 7dc0: ed3e7dec ed3e7dd0 c08425c8 c08275d4 ed424180 00000030 ed424180 ee2e9800
[ 15.085176] 7de0: ed3e7e04 ed3e7df0 c08254c4 c084256c ee251400 00000030 ed3e7e34 ed3e7e08
[ 15.093369] 7e00: c0841d78 c08254a8 ed3e7ed4 7fffffff 00000008 00000000 ee2e9800 ed424180
[ 15.101558] 7e20: ed3e7ed4 00000000 ed3e7e9c ed3e7e38 c0842440 c0841c90 ee754630 b6ef7000
[ 15.109751] 7e40: eeef8000 c0134480 ed3e7e8c ed3e7e58 c0134480 00000000 ed265f00 00000000
[ 15.117943] 7e60: 000000f0 000000c1 000000c1 00000000 ee754630 ed3e7ed4 ed847340 ed847340
[ 15.126151] 7e80: 00000010 beeefa64 ed3e6000 00000000 ed3e7eb4 ed3e7ea0 c07fafa0 c0841f04
[ 15.134346] 7ea0: ed3e7f00 00000000 ed3e7fa4 ed3e7eb8 c07fc20c c07faf68 ed3e7edc 00000000
[ 15.142540] 7ec0: ed791ec8 00000000 00000000 808ca0e8 00000030 ed3e7f00 00000010 00000001
[ 15.150735] 7ee0: 00000000 00000000 ed3e7ed4 00000000 00000000 00000000 00000000 c00b7d00
[ 15.158931] 7f00: 00000010 00000000 00000000 00000000 ed087c00 00000000 40b2ae30 0006422c
[ 15.167132] 7f20: ffffffff 00000000 03c293d3 00000000 000000f9 ed3e7f88 00000001 808ca080
[ 15.175339] 7f40: 00000107 c000f664 ed3e6000 00000000 ed3e7f84 ed3e7f60 c00b4474 c00b7c9c
[ 15.183532] 7f60: 0000000e 00000001 808ca080 00000107 c000f664 beeefa90 00000008 00000000
[ 15.191713] 7f80: beeefa90 beeefa64 00000010 000000f0 00000122 c000f664 00000000 ed3e7fa8
[ 15.199907] 7fa0: c000f4c0 c07fc150 beeefa64 00000010 00000003 808ca0e8 00000030 00000000
[ 15.208096] 7fc0: beeefa64 00000010 000000f0 00000122 017d7840 00000000 808d7198 000000f0
[ 15.216294] 7fe0: beeefa58 beeefa4c 7f6a0d00 b6e61a18 60030010 00000003 00000000 00000000
[ 15.224511] [<c0644f00>] (fec_enet_open) from [<c0817258>] (__dev_open+0xb8/0x114)
[ 15.232100] [<c0817258>] (__dev_open) from [<c0817500>] (__dev_change_flags+0x9c/0x140)
[ 15.240116] [<c0817500>] (__dev_change_flags) from [<c08175cc>] (dev_change_flags+0x28/0x58)
[ 15.248572] [<c08175cc>] (dev_change_flags) from [<c0825e50>] (do_setlink+0x304/0x720)
[ 15.256505] [<c0825e50>] (do_setlink) from [<c0826d58>] (rtnl_setlink+0xf4/0x100)
[ 15.264005] [<c0826d58>] (rtnl_setlink) from [<c0827770>] (rtnetlink_rcv_msg+0x1a8/0x1bc)
[ 15.272235] [<c0827770>] (rtnetlink_rcv_msg) from [<c08425c8>] (netlink_rcv_skb+0x68/0xc4)
[ 15.280537] [<c08425c8>] (netlink_rcv_skb) from [<c08254c4>] (rtnetlink_rcv+0x28/0x34)
[ 15.288474] [<c08254c4>] (rtnetlink_rcv) from [<c0841d78>] (netlink_unicast+0xf4/0x1a8)
[ 15.296492] [<c0841d78>] (netlink_unicast) from [<c0842440>] (netlink_sendmsg+0x548/0x560)
[ 15.304769] [<c0842440>] (netlink_sendmsg) from [<c07fafa0>] (sock_sendmsg+0x44/0x54)
[ 15.312615] [<c07fafa0>] (sock_sendmsg) from [<c07fc20c>] (SyS_sendto+0xc8/0xec)
[ 15.320023] [<c07fc20c>] (SyS_sendto) from [<c000f4c0>] (ret_fast_syscall+0x0/0x3c)
[ 15.327698] Code: 0a00001c ea000038 e59435c8 e1a00004 (e59521f4)
[ 15.333860] ---[ end trace 194130c04452a6bb ]---
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